Product Description

Item Value
Type roller bearing 
Structure cage 
Applicable Industries Energy & Mining
Brand Name TIMKNE/KOYO/NTN/NSK
Model Number NU 1571 EM
Precision Rating P0 P4 P5 P6
Seals Type OPEN
Number of Row Single Row/Double Rows/Four Rows 
Place of Origin China

The rolling body is the centripetal rolling bearing of cylindrical roller. The inner structure of cylindrical roller bearing adopts rollers to be arranged in parallel, and there is a spacer or isolation block between rollers, which can prevent the tilt of rollers or friction between rollers, and effectively prevent the increase of rotating torque.

Cylindrical roller and raceway line contact, radial load capacity. Suitable for bearing heavy load and impact load as well as high speed rotation.

Characteristics :

1. Roller and raceway are in line contact or downline contact, radial bearing capacity is large, suitable for bearing heavy load and impact load.
2. Small friction coefficient, suitable for high speed, limit speed close to deep groove ball
bearings.
3. The processing requirements for shafts or seat holes are high. After bearing installation, the relative deviation of the outer ring axis should be strictly controlled to avoid contact stress concentration.
4. The inner ring or outer ring can be separated, easy to install and disassemble.
 

Model d mm D mm H mm W kg
NJ 220 EM 100 180 34 3.81
NJ 222 EM 110 220 38 5.11
NJ 224 EM 120 215 40 6.48
NJ 226 EM 130 230 40 7.46
NJ 228 EM 140 250 42 9.62
NJ 230 EM 150 270 45 12.1
NJ 232 EM 160 290 48 14.5
NJ 234 EM 170 310 52 19.3
NJ 236 EM 180 320 52 19.8
NJ 238 EM 190 340 55 22.9
NJ 240 EM 200 360 58 27.7
NU 220 EM 100 180 34 102
NU 222 EM 110 220 38 4.8
NU 224 EM 120 215 40 6.47
NU 226 EM 130 230 40 7.34
NU 228 EM 140 250 42 9.1
NU 230 EM 150 270 45 11.7
NU 232 EM 160 290 48 14.2
NU 234 EM 170 310 52 18
NU 236 EM 180 320 52 19.6
NU 238 EM 190 340 55 22.6
NU 240 EM 200 360 58 27

 

 

ZheJiang Ponchi New Energy Technology Co., Ltd. is establised in2571, The company is mainly committed to the promotion and sales of world-famous bearing brands.Over the years it has established good cooperative relations with many companies,with a wide range of products lt is used in machinery, mining,steel.electric paper, automobile and other fields.

With reasonable commodity price,fast logistics delivery,high-quality service, and strong technical force, the company has won the support and trustof customers and truly achieved a CZPT situation between the company and customers.

“Customer’s requirement is our pursuit” the company will always adhere to the new concept of people-oriented, customer service, keeping pace with the times, development and innovation”.

1. Who are we?
We are based in ZheJiang , China, start from 2019,sell to South America(30.00%),Mid East(25.00%),North
America(20.00%),Africa(15.00%),Southeast Asia(10.00%). There are total about 1000+ people in our office.

2. How can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.What can you buy from us?
bearing,ball bearing,Roller bearing,Deep groove ball bearing,Tapered roller bearing

4. Why should you buy from us not from other suppliers?
We have more than 20 years of production experience, we have enough inventory to provide you with a full range of bearings, we
have efficient delivery speed, and can provide you with the packaging you need

5. What services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES;
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese,Spanish,Japanese,Portuguese,German,Arabic,French,Russian,Korean,Hindi,Italian /* March 10, 2571 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: Small (28-55mm)
Material: Bearing Steel
Spherical: Non-Aligning Bearings
Load Direction: Radial Bearing
Samples:
US$ 1/Piece
1 Piece(Min.Order)

|
Request Sample

Customization:
Available

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Customized Request

tapered roller bearing

How do Tapered Roller Bearings Enhance the Performance of Gearboxes and Transmissions?

Tapered roller bearings play a crucial role in enhancing the performance, efficiency, and reliability of gearboxes and transmissions in various applications, including automotive, industrial machinery, and power generation. These bearings are specifically designed to handle radial and axial loads, making them ideal for supporting rotating shafts and gear assemblies. Here’s how tapered roller bearings contribute to the performance of gearboxes and transmissions:

  • Load Distribution:

Gearboxes and transmissions experience a combination of radial and axial loads due to gear meshing and torque transmission. Tapered roller bearings distribute these loads evenly across the rolling elements, minimizing stress concentrations and ensuring reliable operation.

  • Axial Load Handling:

As gears transmit torque, axial forces are generated. Tapered roller bearings are capable of handling both radial and axial loads, ensuring stable and controlled motion while accommodating the forces generated by gear engagement.

  • Reduced Friction and Wear:

Tapered roller bearings are designed with precision-matched rollers and raceways, reducing friction and wear. This results in smoother gear rotation, reduced heat generation, and extended component life.

  • Optimized Axial Preload:

In certain applications, axial preload can be applied to eliminate internal clearance and enhance gear meshing performance. Tapered roller bearings allow for controlled axial preload adjustment, ensuring proper gear engagement and reducing backlash.

  • Accurate Gear Alignment:

Tapered roller bearings aid in maintaining accurate gear alignment and positioning. This is critical for achieving smooth gear transitions, preventing misalignment-related wear, and reducing noise and vibration.

  • Efficient Power Transmission:

Efficient gear operation is crucial for transmitting power from the input to the output shaft. Tapered roller bearings minimize energy losses due to friction, allowing more power to be efficiently transmitted through the gearbox or transmission.

  • High-Speed Capability:

Tapered roller bearings are suitable for high-speed applications, making them suitable for gearboxes and transmissions where rapid gear shifts or changes in rotational speed are required.

  • Reduced Noise and Vibration:

The smooth operation of tapered roller bearings contributes to reduced noise and vibration in gearboxes and transmissions. This leads to a quieter and more comfortable user experience.

  • Long Service Life:

The robust design and high-quality materials used in tapered roller bearings enhance their durability and resistance to wear. This extends the service life of gearboxes and transmissions, reducing maintenance and replacement frequency.

  • Enhanced Gearbox Performance:

Tapered roller bearings optimize the performance of gearboxes and transmissions, contributing to smoother gear shifting, improved fuel efficiency, better power transmission, and overall enhanced drivetrain performance.

Overall, tapered roller bearings are essential components that enhance the efficiency, reliability, and performance of gearboxes and transmissions in a wide range of applications.

cylindrical roller bearing

How do cylindrical roller bearings perform in high-speed or high-temperature environments?

Cylindrical roller bearings are designed to perform reliably in high-speed or high-temperature environments, although their performance may be influenced by various factors. Let’s explore how cylindrical roller bearings perform under these conditions:

  • High-Speed Environments:

In high-speed environments, cylindrical roller bearings are subjected to increased centrifugal forces and higher operating temperatures. To accommodate these conditions, several design features are employed:

  • Cage Design:

Cylindrical roller bearings intended for high-speed applications often feature optimized cage designs. The cage, or retainer, holds the cylindrical rollers in position and prevents excessive friction and heat generation. Cages made of lightweight materials such as phenolic resin or engineered plastics help reduce inertia and minimize cage wear at high speeds.

  • Roller and Raceway Geometry:

The roller and raceway profiles are designed to minimize sliding friction and ensure proper roller guidance. Special attention is given to the surface finish and precision of these components to reduce friction and minimize heat generation. Additionally, high-speed cylindrical roller bearings may have specific modifications, such as optimized roller end profiles and surface coatings, to further enhance their performance in high-speed applications.

  • Lubrication:

Proper lubrication is crucial in high-speed environments to reduce friction, dissipate heat, and prevent premature wear. High-speed cylindrical roller bearings often require lubricants with specific properties, such as low viscosity and excellent thermal stability, to ensure effective lubrication under high-speed conditions. Lubrication methods, such as oil-air lubrication or oil mist lubrication, may be employed to provide sufficient lubricant supply to the bearing at high speeds.

  • High-Temperature Environments:

When operating in high-temperature environments, cylindrical roller bearings face challenges related to elevated temperatures and potential thermal expansion. To address these challenges, the following considerations are taken into account:

  • Bearing Materials:

High-temperature cylindrical roller bearings are often made from heat-resistant materials that can withstand elevated temperatures without compromising their mechanical properties. Common materials include high-temperature steels, heat-resistant alloys, or ceramics. These materials offer improved dimensional stability and resistance to thermal expansion, ensuring the bearing’s performance and longevity.

  • Lubrication:

Proper lubrication becomes even more critical in high-temperature environments. Lubricants with high-temperature stability, such as synthetic oils or greases specifically formulated for high temperatures, are used to maintain adequate lubrication properties and prevent premature lubricant degradation. Lubrication intervals may need to be adjusted to ensure sufficient lubricant replenishment under high-temperature conditions.

  • Clearance and Preload:

In high-temperature environments, the bearing’s internal clearance or preload may be adjusted to compensate for thermal expansion. Proper clearance or preload selection helps maintain the desired operating conditions and prevents excessive bearing play or preload loss due to thermal effects.

It’s important to note that the specific performance of cylindrical roller bearings in high-speed or high-temperature environments can vary depending on factors such as the bearing size, design, operating conditions, and the presence of additional cooling or heat dissipation measures. Consulting bearing manufacturers’ recommendations and considering the application requirements are crucial for selecting the appropriate cylindrical roller bearings for high-speed or high-temperature applications.

cylindrical roller bearing

Can you explain the design and structure of cylindrical roller bearings?

Cylindrical roller bearings have a specific design and structure that enables them to handle high radial loads and moderate thrust loads. Let’s explore the key components and features of cylindrical roller bearings:

  • Inner and Outer Rings:

The inner and outer rings of cylindrical roller bearings are typically made of high-quality bearing steel. The inner ring is mounted on the rotating shaft, while the outer ring is usually mounted in a stationary housing. The rings are precision-machined with raceways that serve as the contact surfaces for the cylindrical rollers.

  • Cylindrical Rollers:

Cylindrical rollers are the main load-carrying components of the bearing. They are cylindrical in shape and have a high length-to-diameter ratio. The rollers are precision-ground to ensure close tolerances and uniform size distribution. The large contact area between the rollers and the raceways allows for efficient load distribution and reduced stresses.

  • Cage:

A cage, also known as a separator, is used to keep the cylindrical rollers evenly spaced and prevent them from coming into contact with each other. The cage is typically made of steel or other materials such as brass or polyamide (nylon). It provides guidance and retains the rollers in position during operation, ensuring smooth rolling motion and preventing roller skewing or jamming.

  • Flanges:

Cylindrical roller bearings may have flanges on the inner or outer rings or both. Flanges are raised edges or shoulders that provide axial guidance and help in locating the bearing in the axial direction. The presence of flanges can also improve the overall rigidity and axial load-carrying capacity of the bearing.

  • Internal Clearance:

The internal clearance of cylindrical roller bearings refers to the space between the rollers and raceways when there is no external load applied. It affects the bearing’s thermal expansion, running accuracy, and ability to accommodate misalignment or axial displacement. Different levels of internal clearance are available to suit specific application requirements.

  • Lubrication:

Cylindrical roller bearings require proper lubrication to minimize friction, reduce wear, and dissipate heat generated during operation. Lubrication helps to maintain the separation between the rolling elements and raceways, preventing metal-to-metal contact and minimizing the risk of premature failure. Common lubrication methods include grease lubrication and oil lubrication.

  • Sealing and Protection:

Cylindrical roller bearings can be equipped with various types of seals or shields to prevent the ingress of contaminants and retain lubrication. These seals and shields help to extend the bearing’s service life and maintain its performance by providing protection against moisture, dust, and other external factors that could cause damage or deterioration.

Overall, the design and structure of cylindrical roller bearings allow them to efficiently handle radial loads and moderate thrust loads. The combination of inner and outer rings, cylindrical rollers, cage, flanges, internal clearance, lubrication, and sealing work together to provide reliable and smooth rotational motion in machinery applications.

China OEM Original Factory Supply Durable N Series N2219 Cylindrical Roller Bearing   bearing driverChina OEM Original Factory Supply Durable N Series N2219 Cylindrical Roller Bearing   bearing driver
editor by CX 2024-02-21